Story No. 33 – Learn from mistakes

Thomas Edison tried two thousand different materials in search of a filament for

the light bulb. When none worked satisfactorily, his assistant complained,

“All our work is in vain. We have learned nothing.”

Edison replied very confidently, “Oh, we have come a long way and we have

learned a lot. We now know that there are two thousand elements which we

cannot use to make a good light bulb.”